Aquatic Species at Risk, Threehorn Wartyback (Obliquaria reflexa)

SARA Status: Threatened

Several horizontal sections on this infographic show the following:

The logo for DFO in the top left and bottom right corner of the infographic.

Two illustrations of the Threehorn Wartyback (Obliquaria reflexa), with the first showing the following aspects labelled:

• single row of 2 to 5 large knobs or ‘horns’
• shell is generally green, tan, or brown

The second illustration shows the following aspects labelled:

• circular to triangular in shape, with a rounded anterior end and a pointed posterior end
• average length of 40 mm but can reach a maximum length of 80 mm

The next section lists threats, including:

• invasive/introduced species/disease
• contaminants
• habitat degradation
• sediment and nutrient loading

A further section notes that Threehorn Wartyback is currently present in the Sydenham, Thames, Detroit, and Grand rivers.
To the right of the infographic, a map of Ontario shows, by an overlaying rectangle, where the related population is found. Another map on the left of the infographic shows a magnified view of where the population is found by use of splotch markings, with lakes Ontario, Erie, and Huron labelled.

A final section on the infographic notes that activities in or near water can harm aquatic species, and lists what you can do:

• report any invasive species sightings to DFO
• prevent contaminants from entering water
• keep your shorelines natural
• protect sensitive habitat; contact DFO before doing any in-water work

Related link

• Aquatic species at risk

Version 2021-05